Warp stop-motion for looms.



N0. 796,694. 7 PATENTED AUG. 8, 1905. W. H. BAKER.

WARP STOP MOTION FOR LOOMS.

APPLICATION FILED FEB. 29. 1904.

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PATENTED AUG. 8, 1905.

W. H. BAKER. WARP STOP MOTION FOR LOOMS.

APPLICATION IILED FEB. 29, 1904.

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PATENTED AUG. 8, 1905.

W. H. BAKER. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED P3129. 1904.

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WlLLIAM H. BAKER, OF CENTRAL FALLS, RHODE ISLAND.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented Aug. 8, 1905.

Application filed February 29, 1904. Serial No. 195,807.

To all whom it may concern.-

Be it known that 1, WILLIAM H. BAKER, a citizen of the United States, and a resident of Central Falls, Providence county, State of Rhode Island, have invented certain new and useful Improvements in l/Varp Stop-Motions for Looms, of which the following is a specification.

My invention relates to a warp stop-motion for looms, and more particularly to a construction in which the heddles not only control the warp in the formation of the shed, but also act when a warp-th read breaks or becomes unduly slack to effect the stoppage of the loom or to indicate the occurrence of such a fault. (A

The invention will be understood by reference to the accompanying drawings,. in which Figure 1 is a central vertical section of a loom, showing one embodiment of my invention applied thereto. Fig. 2 is a front view of the shipper-lever looking into the direction of the arrow (0 in Fig. 1. Fig. 3 is asectional view on the line 3 3 of Fig. 1. Fig. 4 is a detailed view of the serrated slide-bar and its support. Fig. 5 is a sectional view on the line 5 5 of Fig. 3. Fig. 6 is a sectional view on the line 6 6 of Fig. 3. Fig. 7is a sectional Fig. 8 is a sectional view on the line 8 8 of Fig. 3. Figs. 9 and 10 are detailed views of the tappet on the shipper-lever; and Fig. 11 is a side elevation of a form of heddle used herein, certain parts being shown in section; and Fig. 12 is a detailed view of an indicator.

Similar reference-numerals indicate similar parts in the several views.

Referring to the drawings, the numeral 1 designates the loom-frame; 2, the belt-shipper lever; 3, the lay, and 4 the lay-sword. Pivoted to the lever 2 is a tappet 5, adapted to be impinged upon by a dagger 6, fixed to the lay or other moving part of the loom when said dagger is moved into the position shown by dotted lines in Fig. 1 through the mechanism to be hereinafter described. In the present drawings I have shown the loom as having six heddle-frames, although a greater number, if desired, may be employed.

7 designates the heedles, having warp-eyes 8 and composed, preferably, of thin strips or pieces of metal, as is usual in detectors employed in well-known types of warp stopmotions. The heddle-frames com prise an upper bar 9 and a lower bar 10. To the former may be secured the usual or suitable straps and the latter may be connected in the usual manner to actuating-levers. (Not shown.) Each heddle is formed with elongated slots 11,12, and 13, the upper bar 9 passing through the slots 11 and the lower bar 10 through the slots 13 of the heddles of a given frame. Through the slots 12 of the heedles of a given frame extends a reciprocating bar 24 and its support 23, as hereinafter described, and upon which the heddle drops when its warp-thread breaks or becomes unduly slack to effect the stoppage of the loom. This is accomplished through the following mechanism: On a suitable shaft 14 is an eccentric 15, to which is se-' cured a rod 16, connected to a member 17 of an elbow or bell-crank lever fulcrumed at 18, the other member 19 of said lever being provided with upright arms 19, having secured thereto resilient or spring forks or arms 20,

there being as many upright arms as there are heddle-frames. The said elbow-lever is preferably made in two parts, as shown in Fig. 8, connected by a pin 21.

Secured to the loom-frame through suitable brackets 22 are fixed supports 23, each formed with a longitudinal groove in which is seated a slide-bar 24, extendingashort distance above the sides of its support. The side walls of the grooved supports 23 have serrations or notches 25, and the upper edges of theslide-bars 24, which are preferably of steel, also have serrations or notches 26. Pins 27 are secured to the bars 24 and are extended through elongated openings, Fig. 3, in the supports 23 to engage the spring forks or arms 20. It will be seen,therefore, as the shaft 14 is rotated the rod 16, acting through the bell-crank lever and spring forks or arms 20, will cause the serrated bars 24 to be reciprocated in the grooves of the supports 23. This reciprocation will continue during the normal operation of the loom and will only-be interrupted or arrested upon the dropping of a heddle through the breakage or undue slackening of a warp-thread. will be indicated or the loom stopped through the mechanism now to be described.

The supports 23 and slide-bars 24 are provided near each end with openings 28 and 29, respectively, and during the normal operation of the loom as the bar 23 is reciprocated these openings at one time at each movement of the bars will coincide or register. Supported in brackets 30 so as to be longitudinally movable therein is a bar 31, having feelers 32 project- When that occurs, the fault ing therefrom in proximity to the supports 23. At one end ofthe bar 31 is a roller-bearing 32, engaging the upper end of a lever 33, fulcrumed on the frame at 34. The lower end of said lever is secured to a collar 35, fixed on a rod 36, said rod passing through a yokeor bracket 37, secured to the lay-sword 4, the

said bracket having a slotted openingto per. mit of a slight vertical movement of the rod 36. To the forward end of the rod 36 is fixed a collar 38, and to said collar is secured one member 39 of a bell-crank lever fulcrumed at 40 on the lay or other moving part of the loom, the other member of said lever being constituted of the dagger 6. Aspring41, surrounding the rod 36, is secured at one end to the bracket 37 and bears at its other end against a collar 42, fixed on said rod 36.

At each beat-up of the lay the bell-crank lever 39 and rod 36 swing with the lay, thereby rocking the lever 33 on its fulcrum, giving to the bar 31 a forward movement. The

projecting feelers 32 are so disposed withrelation to the supports 23 that during the normal operation of the loom when the bar 24 is moved a full stroke, so as to cause the openings 28 and 29 to register, the said feelers will pass through both of said openings and the dagger 6 will remain in its normal position. (Shown in full lines in Fig. 1.) During such normal working of the loom the heddleframes will act as usual; but when a warp breaks or becomes unduly slack its heddle will no longer be sustained thereby, and as the frame moves to its lowermost position the heddle will drop either into one of the serrations or notches 25 or on the top of the bar 24 and then into the serrations or notches 25 as soon as the serrations or notches in the slide-bar and its support are in alinement, thereby arresting the movement of the bar 24 and preventing the completion of its stroke. As one of the openings 29 of the slide-bar of that particular heddle-frame will not then register with the opening 28 the feeler 32 for that particular frame will impinge against its slide-bar 24, arresting the movement of lever 33 and rod 36; but as the lay continues its forward movement the spring 41 will be compressed through the movement of bracket 37, and the rod-36 will act to rock the bell-crank lever 39 on its-fulcrum, drawing the dagger 6 into the position shown by dotted lines in Fig. 1 and causing it to impinge against the tappet'5 to release the shipper-lever 2 from its notch in the holding-plate and to thereby effect the stoppage of the loom in the usual and well-known manner.

To enable the heddle to arrest the move-- ment of the bar 24 for the purpose above described, it is obvious that the distance between the support 23 and the upper edge of the slot 12 should be equal to or less than the distance between the bars 9 and 10 and the upper edges of the slots 11 and 13, respectively, when the heddle is in its lowermost position.

Supported in the brackets 30 is a rod 42, one end of which is fixed to an extension 43 of the bar31. Surrounding the rod 42 is a spring 44, bearing against one of the brackets 30 and a collar 45 on said rod. As the lay moves back the lever 33 will be rocked backward and the spring 44 will withdraw the feelers 32, as indicated in Fig. 6. In some cases it-is advisable to have the bar 31 only moved bythe movement of the lever 33 on.- the latter nearing the completion of its stroke. By this means more time is allowed for the movement of the bar 24 within its support 23."

Instead of the construction described the lever 33 may be connected directly to bar 31,.

so as to have a positive movement in both directions. A collar 46 on the rod36 serves as a stop for the yoke 37 and'prevents a too great movement of the rod 36 through the action of the spring 41. f I

The tappet 5 is preferably fulcrumed at 5".

on the shipper-lever 2 and is adapted to be swung at the Will of the operator out of the path of the dagger 5 as is sometimes required when starting the loom during the temporary slackening of any of the warp-th reads or when it is required to throw the stopping or indicating mechanism out of action, a spring 47 being provided, if necessary or desired, to

hold the tappet in or out of its moved posi tion.

hinged to the shipper-lever 2 may be attached to an indicating mechanism, so that the impingement of the dagger 5 on the said tappet instead of stopping the loom will set in operation mechanism to indicate merely that a warp-thread has been broken or become unduly slack, as will be readily understood. After the broken thread has been repaired or the slack thread tightened and the detector moved to its normal position the indicating mechanism may be reset by the operator.

By withdrawing the pin 21 the two parts of the bell-crank lever 17 19 may be diseonnected, so that no movement will be imparted to the slide-bars 24, said bars remaining in such position that the openings 29 will register with the opening 28 in the supports 23, so as not to set in operation the stopping mechanlsm.

It is to be understood that the invention may be employed in connection with any suitable form of indicating devices to show breaking or undue slackening of a warp-thread and that the invention is not confined to mechanism for stopping the loom.

In Fig. 12 I have shown the tappet 55 attached to a lever or rod 50, pivoted at 51 to the breast-beam and carrying at its upper end a suitable signal or indicator disk 52. When the dagger 6 is caused to impinge upon the The tappet 5 instead, however, of being.

tappet 55, the indicator will be moved to the position shown in the dotted lines, thus calling the attention of the weaver to the existence of a fault. A stop 53 is provided to limit the movement of the indicator, and after the broken thread has been repaired or the slack thread tightened and the drop moved to its normal position the indicator may be returned to its original position by the weaver.

In the foregoing description the movement of the feeler has been interrupted to actuate the stopping or indicating mechanism; but it is obvious that the dagger may be so placed as to be normally in the path of the tappet and connected with the feeler, so that "duringthe normal operation of the loom it will be moved out of the path of the tappet and to remain in its normal position when a warpthread breaks or becomes unduly slack. This equivalent mode of operation may be effected by so arranging the openings in the slide-bar bar, thereby allowing the feeler to enter the openings to complete its full stroke, no movement in relation to the lay or going part of the loom taking place. The free end of the dagger would, therefore,impinge upon the tappet and actuate the stopping or indicating mechanism.

What I claim, and desire to secure by Letters Patent, is-

1. In a warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, a reciprocating bar passing through said slots and having means therein whereby the reciprocations may be arrested by engagement of a heddle therewith, a feeler cooperating with said bar, and stopping or indicating mechanism controlled through the stoppage of said bar.

2. In a warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, a bar extended through said slots, means to normally reciprocate said bar, means cooperating with a dropped heddle to arrest the movement of said bar, a feeler cooperating with said bar, and stopping or indicating mechanism controlled through the stoppage of said bar.

3. In a Warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, a reciprocating apertu red bar extended through said slots, a feeler adapted tov engage said aperture during the normal operation of the loom and to impinge upon said bar when the movement of the latter is arrested by a dropped heddle, and stopping or indicating means controlled by or through said feeler.

4. In a warp stop-motion for looms the combination with aheddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, apertu red bars extended through said slots, means to reciprocate said bars, feelers adapted to enter the apertures of said bars during the normal operation of the loom, means to move said feelers toward and from said bars.

5. In a warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, a reciprocating bar extending.

through said slots, a feeler actuated by the lay or moving part of the loom, a dagger mounted upon a moving part of the loom, connections between said feeler and dagger whereby the latter is moved into position to effect the stoppage of the loom when the movement of said bar is arrested by a dropped heddle.

6. In a warp stop-motion for looms the combination with a' heddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, a reciprocating bar extended through said slots, said bar having means thereon to be engaged by a dropped heddle to arrest the movement of the bar, a feeler and means to cause the same to impinge against the bar when the movement of the latter is arrested, and means controlled by said feeler at such time to stop the loom or to indicate a broken or abnormally slack warp.

7. In a warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, a bar passing through said slots, a feeler device, means to produce a relative movement between said bar and feeler so that during the normal operation of the loom the 7 gated slot and adapted to move independently of the frame, an apertu red bar passing through said slots, a feeler device, means to produce a relative movement between said bar and feeler. so that during the normal operation of the loom the feeler shall pass into the aperture, means cooperating with a dropped heddle whereby such movement is arrested to permit of an impingement between said bar and said feeler, and stopping or indicating means controlled by or through the feeler.

9. A warp stop-motion for looms comprising a serrated or notched bar, means to reciprocate said bar including a flexible arm or fork, heddles adapted to arrest the movement of said bar when a warp-thread breaks or becomes unguly slack, and a feeler cooperating with said 10. A warp stop-motion for looms comprising a serrated or notched support, a bar carried by said support and projecting above the same, said bar having its upper edge serrated or notched, means for reciprocating said bar, heddles normally suspended by the warp-threads above said bar and support and adapted when a warp-thread breaks or becomes unduly slack of engaging said serration to thereby arrest the movement of said bar, and a feeler cooperating with said bar.

11. A warp stopmotion for looms comprising a serrated or notched support, a bar carried by said support and projecting above the same, said bar having its upper edge serrated or notched, means to produce a relative movement between said support and bar, heddles adapted to arrest said movement when a warpthread breaks or becomes unduly slack, and a normally moving feeler cooperating with said bar.

12. In a warp stop motion for looms the combination with a heddle frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, of stopping or indicating mechanism, an apertured bar passing through said slots, a feeler device and means to actuate the same, means to normally move said bar so that said feeler shall be uninterrupted in its full movement relative to the bar, and means when a warp-thread breaks or becomes unduly slack to arrest the movement of said feeler to thereby actuate said stopping or indicating mechanism.

13. In a warp stop motion for looms the combination with a heddle frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, of stopping or indicating mechanism, a movable bar passing through said slots, a movable feeler device, means to normally prevent impingement between said bar and said feeler, and means when a warpthread breaks or becomes unduly slack to permit impingement between said bar and feeler to thereby actuate said stopping or indicating mechanism.

14:. In a warp stop-motion for looms the combination with aheddle-frame provided with a series of heddles each heddle having an elongated slot and adapted to move independently of the frame, of a bar passing through said slots, a feeler, means to produce a relative movement between said bar and feeler, a dagger and means connecting the same to said feeler so that the dagger will be moved thereby, a tappet adapted to be impinged upon by said dagger, means to arrest said relative movement when a warp-thread breaks or becomes unduly slack to thereby cause the dagger to impinge upon the tappet, and stopping or indicating means actuated by the movement of said tappet.

15. A warp stop-motion for looms comprising a series of apertured bars, a bar having a series of feelers projecting therefrom in proximity to said apertured bars, means to produce a relative movement between said apertured bars and feelers, a dagger and means connecting the same to saidfeeler-bar, and means to arrest said movement when a warpthread breaks or becomes unduly slack to position said dagger, for the purpose described.

16. In a warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles, each heddle having an elongated slot and adapted to move independently of the frame, of a bar passing through said slots, a feeler, means to normally move both said bar and feeler so that they shall impinge one upon the other at predetermined times, the coaction of said bar and feeler actuating, when a warp-thread breaks, the loom-stopping mechanism.

17. In a warp stop-motion for looms the combination with a heddle-frame provided with a series of heddles, each heddle having an elongated slot and adapted to move independently-of the frame, of an apertured bar passing through said slots, a feeler, means to produce a relative movement between said apertured bar and feeler, the coaction of said apertured bar and feeler actuating, when a warp-thread breaks, the loom-stopping mechanism.

18. In a loom the combination with stopping or indicating mechanism, of a heddle-frame provided with a series of heddles, each heddle having an elongated slot and adapted to move independently of the frame, a bar passing through said slots, a feeler, means to normally move both said bar and feeler so that they shall impinge one upon the other at predetermined times, and a dagger the movement of which is controlled by said feeler when a warp-thread breaks to thereby set in operation said stopping or indicating mechanism.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

WILLIAM H. BAKER. Witnesses:

H. I. SHooBRDIsE, W. H. BEESTON. 

